Dual wheel and demountable rim



DUAL WHEEL 'AND DEMOUNTABLE RIM Filed Dec- 9, 192 5 2 Sheets-Shae! 1 INVENTOR. fosffi/ Q 51ml.

ATTORNEY.

Get. 20, 193i. J. G. SWAIN 1,828,162

DUAL WHEEL Aim DEMOUNTABLE RIM Filed Dec. 1925 2 Sheets-Sheet 2 V i INVENTOR. V v J 7 9mm.

. ATTORNEY.

Patented Oct. 20, 1931 UNITED STATES PATENTYOFOFICE JOSEPH G. SWAIN, OF AKBlON, OHIO, ASSIGNO'R TO THE FIRESTONE PRODUCTS COMPANY, OF AKRON, OHIO, A CORJPORA'RION OF OHIO i DUAL WHEEL AND lJEMOUNTABLlE Application filed llecember 9, 1925. Serial No. 74,302.

P This invention relates to dual wheels and described, but so far as the'de'mountable feademountable rim equipment therefor.

One purpose of the invention is to devise adual wheel adapted to have demountable attached clamp rims readily mounted thereon or removed therefrom.

-Another purpose of the invention is to provide in such a'wheel axially spaced rim seats with means between the seats on which'the inner rim may be slid into position on the inner seat.

Another purpose is to provide in a dual wheel means for maintaining a circulation of air about the inner surfaces of the rims to dissipate heat generated in the wheel brakes in such a manner as toprevent blistering of the tires which has heretofore resulted in the operation of busses or trucks.

The foregoing and other objects are ob-- tained by "the construction shown in the .ac-

companying drawings and described below. It is to be understood thatthe invention is,

not limited to the specific formthereof shown and described.

Of the accompanying drawings: Figure 1 is a side elevation of a a wheel embodying the invention;

Figure 2 is a radial section on line 22 of portion of Figure 1;

' Figure 3 is a radial section on line 33 of Figure 1 Figures 4, 5 and 6 are respectively a side elevation, a plan and a vertical section of a clamp adapted tobe attached to the demountable rim shown by a riveting operation.

Referring to the drawings, 10 represents the hub of a metallic dual wheel formed with an outer web portionll and an innerweb portion 12. The outer web 11 is formed with outwardly inclined rim seats 13, 13 equally spaced about the wheel and is cut away as at 14, 14 between said seats to permit mounting of a rim'on the inner side of the wheel as will be explained.

The inner web 12-is also provided with out wardl'y inclined rim seats 15, 15 also equally spaced about the wheel in staggered relation with respect to seats 13 or in axial alignment with cutaway portions 14 of the outer web 11. The inner web 12 may be'cut away as said clamps .and threaded re at 16, 16between seats 15 for a purpose to be i tures of the wheel rims are concerned, may be formed with a continuous rim seat. On web 12 there is shown the usual brake drum 17" formed with fins 17 17 for dissipating heat therefrom.

The wheel as thus described is adapted to tached wedge clamps 19, 19 arranged to engage respectively on seats 13-andseats 15 and adapted to be urged axially onto said seats by nuts 20, 20 on bolts 21, 21 extended through pectively into webs 11 and 12.

It will be apparent that cutaway portions i 14 permit of sliding a rim 18 onto the inner seats 15 by; aligning the clamps 19.the rewith. I

The positions of the inner rim seats 15 are such that the nuts 20 can be actuated to clamp the rim in place by means ofa wrench operable through thecutaway portions in the outer web 11. l 1

To facilitate the positioning of the inner rim, there is provided a circumferential series of transverse webs 22, 22 extending from the web 11 inwardly of the seats 13 to the web 12, the outer edges of webs 22 providing guideson which a rim18 may ride into place on the inner seats 15. 1 r

Webs 22 areadapted during rotation of the wheel to create currents of airabout the wheel under the rims 18 to convey heat from the brakes away from said rims, the turbulence being enhanced by providing apertures such as shown at 23in each web 22. The'cutaway portions on both the inner and outer web portions permit efiective circulation of airabout the inner surfaces of the rims;

Both mounting and demounting of rims 18 are easily accomplished as will be readily understood. The attached clamps 19 of a rim 18 may be aligned with cutaway portions 14 to clear the outer web llwhen mounting or demounting a rim on the inner seats 15, the webs 22 serving asa guide for the rim and spaces the use of a iong-armec H cooperation with the inner nuts l rotation. of the wheel, whirling cu inaway from the inner prevent blistering Modifications of the i sorted to without dep" thereoi or the scope or e What is claimed is: 1. A dual. wheel and eluding a wheel having or o l enter anig; portions i .11 rein the spirit oended claims.

- onstruction inially spaced peripheral 11 seatir Z a pair of rims adapted to be seated on said inner and outer seating portions, transverse- 1y extending webs between he outer and inner seating portions for guin 21g the rim onto the inner seating portion, said webs being apertured and adapted to induce currents of air about the inner so cos of the rims during rotation of the wneen 2. In a dual wheel construction, a Wheel body comprising spaced apart inner and outer rim-seating portions, said outer scating portion being constructed to permit passing a rim thereover onto the inner seating portion, and means for guiding a rim onto the inner rim-seating portion comprising nially extending members between said seat ing portions.

3. A dual Wheel and rim construction including a wheel having a pair of axially spaced segmental rim seating surfaces, inner and outer rims seated upon said surfaces, means for securing the rims upon said surfaces, and transversely 'e :tending webs between the outer and inner seating surfaces for guiding the inner rim onto its seating surface, said webs being further adapted to induce currents of air about the inner s'urfaces of the rims during rotation of the Wheel.

4. In a dual wheel construction, a wheel body comprising spaced apart inner and outer rim-seating portions, and means "for guiding a rim onto the inner gim seating portion comprising axially extending web members between said seating portions, said web members being adapted for inducing circulation of air about said wheel by rotation of the wheel.

5. A dual wheel and rim construction having a hub portion, two series of spokes projecting outwardly therefrom, transverse Webs extending between the inner and outer series of spokes, said webs operating to support and guide the inner tire rim when being 7 60 slid over the wheel onto said inner rim seats.

JOSEPH G. SlWAIN. 

